18:19

Oggie Double Offset

21:15

RECTANGLE TO ROUND. SHOE TYPE, OFFSET

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HACK Your Brain (Beginners Learn To Draw Fast!)

17:15

Eccentric Reducer Sheet Metal

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Offset Oval Reducer Marking/Layout

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Round Deducer GI Duct | Khalid 95

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Basic square to round triangulation

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Transition Offset Elbow